ppkarwasz commented on PR #1165:
URL: https://github.com/apache/logging-log4j2/pull/1165#issuecomment-1364420974
OSGI resolves a bundle's dependencies **before** it loads any class from the
bundle. Running the tests in `log4j-osgi` with `-Dfelix.version=4.4.1` (which
contains OSGI Framework API 1.7) I get an error like this:
```
org.osgi.framework.BundleException: Unresolved constraint in bundle
org.apache.logging.log4j.api [11]: Unable to resolve 11.0: missing requirement
[11.0] osgi.wiring.package;
(&(osgi.wiring.package=org.osgi.framework)(version>=1.8.0)(!(version>=2.0.0)))
```
Probably, what is happening in your test is that `log4j-api` is not
initialized inside the OSGI container, but is contained in the tests runtime.
Log4j2 is initialized before the OSGI framework detect the version
incompatibility.
the
Amore stable solution to this problem would be to set the `OSGI_AVAILABLE`
field from the bundle's activator. This way we have a garantee that
`OSGI_AVAILABLE` is set if and only if the activator of the bundle has been
called.
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